Method and Apparatus for Allocating Channel Bandwidth in Wireless Internet Protocol Television Systems

1. A method for allocating channel bandwidths in a wireless Internet Protocol TeleVision (IPTV) system, the method comprising: receiving an additional service offering request from a user in a channel saturation state that exceeds a number of users who can use the service; measuring remaining execution times until a service of each terminal that is currently receiving the service is terminated; setting a minimum of the measured remaining execution times to a unit time; calculating a securable channel bandwidth per the unit time with respect to each terminal that is currently receiving the service; summing the securable channel bandwidths per the unit time for all terminals that are currently receiving the service; and allocating the requested channel bandwidth in order to provide the additional service, if a summation of the securable channel bandwidths per the unit time is at least equal to the channel bandwidth required to provide the additional service.

2. The method of claim 1 , wherein allocating the requested channel bandwidth further comprises: reducing and re-allocating each channel bandwidth allocated to the terminals that are currently receiving the service.

3. The method of claim 1 , wherein the service includes a Video on Demand (VoD) service.

4. The method of claim 1 , further comprising: receiving information regarding an executable time using data stored in buffers of terminals from the terminals that are currently receiving a service, wherein the received information is information regarding a data-not-reception executable time.

7. An apparatus for providing a wireless Internet Protocol TeleVision (IPTV) service, comprising: a channel bandwidth calculating unit for measuring, if an additional service offering request is received from a user, by the apparatus in a saturation channel state that exceeds a number of users who can use the service, remaining execution times until the service of each terminal that is currently receiving the service is terminated, for setting a minimum of the measured remaining execution times to a unit time, and for calculating a securable channel bandwidth per the unit time with respect to each terminal that is currently receiving the service; a device for summing the securable channel bandwidth per the unit time for all terminals that are currently receiving the service; and a channel bandwidth allocating unit for allocating, if the summation of the securable channel bandwidths per the unit time is at least greater than a channel bandwidth required to provide the additional service, the requested channel bandwidth in order to provide the additional service.

8. The apparatus of claim 7 , wherein the channel bandwidth allocating unit reduces and re-allocates each channel bandwidth allocated to the terminals that are currently receiving the service.

9. The apparatus of claim 7 , wherein the service includes a Video on Demand (VoD) service.

10. The apparatus of claim 7 , further comprising: a time information receiving unit for receiving information regarding an executable time using data stored in buffers of terminals from the terminals that are currently receiving a service, wherein the received information is information regarding a data-not-reception executable time.